No eruptions have taken place at this particular volcano for at least 10,000 years, so what comes next is a total unknown. Especially when you consider that the average yearly number of earthquakes across the Reykjanes peninsula is only 1,000 to 3,000. (Depending on where you live, you may think “only” is not the right word to describe the situation.)
An eruption could lead to catastrophic global cooling
A “seismic crisis” has been occurring in the area near Fagradalsfjall since late Feb 2021, says electoverse.net. This activity has been interpreted as intrusion of magma at shallow depths, which could lead to a new eruption.
Fadradalsfjall is a table mountain in the Reykjanes Peninsula, NE of Grindavik, Iceland.
Very little is known about the eruptive history of the volcano; but according to both VolcanoDiscovery.com and Volcano.si.edu, no eruptions have occurred during the past 10,000 years — in other words, it’s anyone’s guess what this volcano is capable of when it does blow.
“I think this is a sign the magma dike is growing very fast,” said Kristín Jónsdóttir, of the Icelandic Meteorological Office (IMO), referring to the huge increase in earthquake activity.
The IMO has also officially stated that these magmatic movements are the likely cause of the ongoing earthquake swarm in the peninsula–a swarm that has now totaled 34,000 quakes in two weeks.
Will Iceland be home to the next “big one”?
Of today’s reawakening volcanoes, those located in Iceland are perhaps the most concerning.
It is this highly-volcanic region that will likely be home to the next “big one” (a repeat of the 536 AD eruption that took out the Roman Republic…?) — the one that will return Earth to another volcanic winter.
Volcanic eruptions are one of the key forcings driving Earth into its next bout of global cooling.
Volcanic ash (particulates) fired above 10km –and so into the stratosphere– shade sunlight and reduce terrestrial temperatures. The smaller particulates from an eruption can linger in the upper atmosphere for years, or even decades.
Today’s worldwide volcanic uptick is thought to be tied to low solar activity, coronal holes, a waning magnetosphere, and the influx of Cosmic Rays penetrating silica-rich magma.
In 536 AD, a thick fog blanketed much of Asia, the Middle East, and Europe, shrouding these regions in darkness for one and a half years straight. According to natureworldnews.com, the ambient temperatures during that year’s summer decreased by 1.5 to 2.5° Celsius, contributing to that decade being the coldest for the last 2.3 millennia. Continents experienced unseasonable snowfall during this time, crops died, and many millions starved to death.
Millions upon millions of people died
New ice analysis reveals that a violent volcanic eruption in Iceland was the culprit. The explosion released a thick plume of ash into the stratosphere in the early part of 536 AD blocking the Sun and causing crop failure across the hemisphere, killing millions upon millions of people. In addition, two more massive eruptions also occurred in 540 AD and 547 AD — these repeated eruptions caused untold suffering and economic stagnation in Europe for the next 100+ years, until the year 640 AD.
Thanks to Steven Rowlandson for this link
The post Iceland – 34,000 quakes in two weeks could lead to an eruption appeared first on Ice Age Now.
via Ice Age Now
March 12, 2021 at 01:34PM